brooks



Feb. 28, 1956 BROOKS 2,736,146

CYLINDER HONE Filed Dec. 10, 1953 2 Sheets-Sheet 1 INVENTOR. fiamosf Brooks T. E. BRQOKS 2,736,146

CYLINDER HONE Feb. 28, 1956 Filed m. 10, 1953 2 Sheets-Sheet 2 2' IN V EN TOR.

Homasfifirooks Ms dftornqys a); M #WM United States Patent CYLINDER HONE Thomas E. Brooks, Clarinda, Iowa, assignor to Lisle Corporation, Clarinda, Iowa, a corporation of Iowa Application December 10, 1953, Serial No. 397,311

7 Claims. (Cl. 51184.4)

This invention relates to a cylinder honing tool wherein a body member has means to pivotally support a plurality of hone carrying arms, and means is provided for adjusting a spring that tensions the arms properly for honing operation of the hones mounted thereon at various diameters.

One object of the invention is to provide a cylinder honing tool in which a body member is provided with peripheral notches to looselyreceive hone carrying arms, the arms having lateral pivot ears for coaction with the upper end of the body member, there being provided a cone and adjusting means therefor wherein the cone coacts with the upper ends of the arms above the pivot ears thereof for effecting a change in their inclination under the tension of a spring imposed on the arms for honing action after the hones carried thereby are located in a cylinder for honing it.

Another object is to provide a comparatively simple construction that is inexpensive to manufacture, easy to assemble and reliable in operation.

Still another object is to provide hone carrying members pivoted on the lower ends of the arms and carrying hones for the honing operation, the arrangement being such that the arms can be closely nested relative to a shaft provided for rotating the tool which allows the hones to be entered in a cylinder of relatively small diameter yet enables the use of relatively thick hones for long hone life.

A further object is to provide a honing tool having great range of adjustment for the hones and their carrying arms, which provides a tool useable in a great range of work diameters and one which has ease and speed of operation because it can be inserted and removed relative to the work by simply pressing the arms together with one hand, adjustment being necessary on only the first cylinder of a set of cylinders of the same diameter.

Still a further object is to provide means for limiting the pivotal motion of the hone carriers relative to the 7 arms to prevent excessive whip of the hones if they are accidentally brought out of the cylinder while being rapidly rotated by means of an electric motor or the like.

Still a further object is to provide a two-stage limiting ring mounted on the body member and a novel pivot stop arrangement on the hone carriers so that adjustments can be made in two ranges with the throw-out of the arms limited by the ring in case of accidental removal of the honing tool from the cylinder while it is in operation.

An additional object is to provide a modified form of construction which omits some of the features of the cylinder honing tool thus far referred to and makes the device adaptable for relatively small cylinders, such as brake cylinders as distinguished from internal combustion engine cylinders.

With these and other objects in view, my invention consists in the construction, arrangement and combination of the various parts of my cylinder honing tool whereby the objects contemplated are attained as hereinafter more fully set forth, pointed out in my claims and illustrated in the accompanying drawings wherein;

Fig. l is a perspective view of a cylinder honing tool embodying my present invention.

Fig. 2 is a perspective view of a modified form thereof adapted for cylinders of smaller diameter.

Fig. 3 is an enlarged sectional view on the line 3-3 of Fig. 1.

Fig. 4 is a side elevation somewhat enlarged over Fig. 1 with some of the parts of the right half (beyond line AB) of the cylinder hone shown in section.

Fig. 5 is a sectional view on the line 5-5 of Fig. 3 showing one of the hone carrying arms at its minimum adjusted position by solid lines and its maximum adjusted position by dotted lines when a limiting ring is adjusted to one position as will hereinafter be referred to.

Fig. 6 is a similar sectional view showing the limits of the hone carrying arm when the limiting ring is adjusted to its other position, the hone carrier element being shown reversed in this figure to cooperate with the arm in the limiting of the pivotal motion of the hone relative to the arm.

Fig. 7 is a detail sectional view on the line 7-7 of Fig. 5; and

Fig. 8 is a view similar to Fig. 4 showing the modification of Fig. 2.

On the accompanying drawings I have used the reference numeral 10 to indicate a body member. The body member 19 is in the form .of a short cylinder having an annular flange 15 therearound as shown in Fig. 4. The body 10 may be made of die cast material or the like.

I provide a shaft 12 having its lower end permanently threaded at 13 into the body member 10 and its upper end threaded at 14. A hub 16 of a flexible shaft 18 is secured to the upper end of the shaft 12 and terminates in a shank 20 to be received in the chuck of an electric drill or similar tool for rotating the cylinder hone disclosed.

The body member 10 is provided with notches in its periphery, the bottoms of which are indicated at 22 and the sides thereof at 24. Each notch 22-24 of the body member 10 has received therein a hone supporting arm 26. Adjacent the upper end of the arm a pair of laterally extending pivot ears 28 are provided above which there is a head 30.

The pivot ears 28 rest on a hardened plate 32 within the flange 15 and secured in position by screws 33. A cone 34 is adapted to coact with the heads 30 and includes a hub 36 which is slidable on the shaft 12. An adjusting nut 4'1) is threaded 011 the portion 14 of the shaft 12 and a spring 38 is interposed between the nut 40 and the cone 34 for the purpose of properly tensioning the arms 26 as will hereinafter appear.

Adjacent the lower end of each arm 26 is a pair of cars 42 which straddle a channel shaped member 44 that serves as a hone carrier. A pivotal connection is provided between the channel 44 and the cars 42 in the form of a removable cotter pin 46.

An angle shaped stop 4850 is provided in each channel 44, the portion 48 being vertical and the portion 50 being horizontal as illustrated. Each of these portions has its own purpose as will hereinafter appear.

A hone 52 is secured to each hone supporting channel 44, as by being cemented thereto, and the three bones are adapted to contact the inner surface of an engine cylinder for honing the same. The range of diameters is 2" to 4" as shown in Fig. 5, and 4" to 7" as shown in Fig. 6. These dimensions are merely representative and are not intended to be limiting.

I provide a retaining and limiting ring 54 of cyclindrical character surrounding the body member 10 and provided with notches 5658 adapted at times to register with the notches 2224 of the body member, the numeral 56 indicating the bottom of the notch in the ring and the numeral 58 indicating the sides thereof. The ring 54 is oscillatable on the body member 19 and islimited in its oscillation by means of a slot and screw connection 6ii-62. In the left half of Fig. 3 the ring is shown adjusted to a position with its notches 56-S8 out of registry with the notches 2224 of the body member 1i) whereas in the right half thereof it is shown adjusted to a position where they do register with each other. When in the first position just mentioned, the arms 26 have a range of movement between the full and dash line positions shown in Fig. 5, whereas the second adjustment permits the arms to go on out to the dash line position of Fig. 6.

The left hand hone carrier 44 in Fig. 4 has arrows pointing to opposite ends thereof and indicia thereon reading as follows: DOWN-2 to 4" CYL. and DOWN4" to 7 CYL. As shown in Figs. 4 and 5, the stop 48-50 is below the pivot 46 and, accordingly, the arm 26 can be swung from the full-line position of Fig. to the dash line position (in which latter position it engages the lower inner edge of the ring 54 indicated by a dot 55) and the pivoting of the hone will be limited to remain in the vertical position between the 2" and 4 dimensions illustrated in Fig. 5. At the four-inch dimension the lower end of the arm 26 engages the stop portion 48 as indicated by the dot 49 so that any further outward swinging of the arm 26 would also slant the hone 52 and it could not then be operated properly in a cylinder of greater than 4" diameter.

When the hone carriers are turned over as in Fig. 6, the stops 48-50 will be above the pivot 46 and at the 4" position shown therein. The ring 54 is adjusted so that its notch 56-58 is in registry with the notch 22-24. The arm 26 will engage against the stop St} at 51 when the arm 26 is at the dot 55 (same position as shown by dash lines in Fig. 5). The hone can remain vertical while the arm is being adjusted on out to the 7" position at which time the lower end of the arm engages the web of the channel 44 as shown in dash lines and indicated by the dot 53.

Thus the ring 54 and the hones 52 can be adjusted for operation in either of two ranges by the shifting of the ring from one position to the other and by reversing the bones end for end. In each range the hones can pivot to assume a vertical position and are limited in case they fly out because of the cylinder hone tool being accidentally removed from the cylinder while it is being rotated. There is thus less danger of damaging the cylinder or the tool in case it strikes against adjacent parts of the engine.

In the form of my invention shown in Figures 2 and 8 most of the parts are similar to those already described and have been given the same reference numeral with the addition of the distinguishing characteristic a. The shaft 12a in this instance, however, is hexagon in addition to being threaded and its lower end is received in a hexagon shaped opening of the body member a in which it may be a press fit or otherwise suitably secured. The heads 30a of the arms 26:: are rounded due to the small size of the cone 34a and instead of the retainer ring 54 I provide a garter spring 55 located in an annular groove 57 of the head 10a. This spring holds the arms 26a in position in the slots of the body member 1911 and biases them inwardly to the minimum adjusted position, yet permits them to be adjusted outwardly to a larger diameter as shown by dotted lines in Fig. 8 when the adjusting nut 40a is tightened down on the spring 38a. At their lower ends, the arms 26a are received between the flanges of the channels 44a instead of straddling the channels as the por tions 42 of the arms 26 do. The type of device shown in Figs. 2 and 8 is particularly suitable for small cylinders such as hydraulic brake cylinders.

Some changes may be made in the construction and arrangement of the parts of my invention without departing from the real spirit and purpose thereof, and it is my intention to cover by my claims such modified forms of structure or use of mechanical improvements as may be reasonably included within their scope.

I claim as my invention:

1. In a honing device, a body member having a radial notch therein, an arm suspended in said notch and having laterally extending portions, said portions having a pivotal movement relative to the top of said body member and engaging said top, a shaft extending upwardly from said body member, a cone element guided thereby, adjustable toward and away from said body member and engageable with the upper end of said lever, spring means biasing said body member and said cone relatively toward each other, and a honing member pivotally carried by the lower end of said arm.

2. In a honing device, a body member having a notch in the periphery thereof, an arm received in said notch and having laterally extending portions, said portions having a pivotal movement relative to said body member adjacent the upper end thereof, said portions having constant engagement with said body member, a shaft extending upwardly from said body member for rotating the same, a cone element axially slidable thereon and engageable with the upper end of said lever, adjusting means for said cone movable axially of said shaft, and a honing member pivotally carried by the lower end of said arm.

3. In a honing device, a body member having notches in the periphery thereof, a hollow cone member carried by said body member and spaced in one direction therefrom, a shaft operatively connecting said body member and said cone member together, said cone member being slidable thereon, adjusting nut means for said cone mem ber relative to said body member, said nut means being threaded on said shaft, hone carrier arms located in said notches and having laterally extending pivot ears located between said body member and said cone member and engaging the body member, the ends of said arms beyond said ears being engageable with said cone member for adjusting purposes, a bone for each arm, and carriers therefor pivotally mounted adjacent the other ends of said arms that extend in a direction opposite said cone member.

4. In a honing device, a body member having notches in the periphery thereof, a shaft extending upwardly from said body member, a cone member slidable along said shaft, means for adjusting said cone member along said shaft toward and away from said body member, hone carrier arms located in said notches and having laterally extending pivot ears intermediate their ends and located above said body member, the upper ends of said arms being engageable with said cone member, hone carriers pivotally mounted on the lower ends of said arms, and means for limiting the pivotal motion of said hone carriers relative to said arms.

5. In a honing device, a body member having notches in the periphery thereof, a shaft extending from said body member, a cone member on said shaft, means for adjusting said cone member toward and away from said body member, hone carrier arms located in said notches and having laterally extending pivot ears engaging said body member, one end of each of said arms being engageable with said cone member, a ring surrounding said body member and provided with notches to register with the notches thereof, said ring being rotatable thereon, and means for limiting the rotation to one position with said notches registered and another position with them out of registry.

6. In a honing device, a body member, an arm mounted for pivotal movement relative to said body member adjacent the upper end of the arm, a shaft affixed to said body member and extending upwardly therefrom in rigid relation thereto for rotating the body member, a cone element axially slidable on said shaft and internally engageable with the .upper end of said arm, adjusting means for said cone movable axially of said shaft, a spring interposed between said adjusting means and said cone, References Cited in the file of this patent glciazitdhgrnlilng member pivotally carried by the lower end UNITED STATES PATENTS 7. In a cylinder honing device, a body member, an arm 4671028 Eckenl'oth g 121 1892 mounted for pivotal movement relative to said body 5 547,451 Radspmn er 81 1895 member adjacent the upper end of the arm, a shaft ex- 1,164,704 Cfmrembs 1915 tending from said body member in non-rotatable relation 1,180,831 Flfllay 1916 thereto for rotating the body member in a cylinder, a 1,418,847 Samson June 1922 cone member on said shaft and internally engageable with 2,159,962 Blood May 1939 the upper end of said arm, adjusting means on said shaft 10 FOREIGN PATENTS i ig agjustmgnt i g i it; if l 12,613 Austria June 19, 1902 an Sal o ymem an an eonga e e 011mg 0 0 N h l d J 15 1951 member pivoted inetrmedaite its ends to the lower end of said arm. 

